Process for fractionating polymers
US5030713A · kind A · utility
5Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1989 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Nov 29, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for crystallizing polymer subjected to temperature rising elution fractionation is provided. The process improves the separation of the polymer species upon elution and significantly reduces "tailing" typically observed with such fractionated species. The improvements consists of crystallizing the polymer from a dilute polymer solution outside of the column and in the absence of column packing material. Only after crystallization is the polymer combined with the column packing material. This can be accomplished by either dry-blending or by slurrying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.